package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImp implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入1条数据
        dishMapper.insert(dish);
        Long dishId=dish.getId();
        //向口味表插入n条数据
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {dishFlavor.setDishId(dishId);});
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageResult pageResult=new PageResult();
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        pageResult.setRecords(page.getResult());
        pageResult.setTotal(page.getTotal());

        return pageResult;
    }

    @Override
    public void deleteBatch(List<Long> ids) {
        for(Long id: ids){
            //先来判断菜品是否能被删除，是否起售
            Dish dish=dishMapper.getById(id);
            if (dish.getStatus()== StatusConstant.ENABLE){
                //当前菜品处于起售中,不能删除
                throw  new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        List<Long> setmealIds=setmealDishMapper.getSetmealIdsByDishIds(ids);

        if(setmealIds!=null&&setmealIds.size()>0){
            //判断是否关联套餐
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //判断有没有连在一起的口味数据，删除口味数据
        for(Long id:ids){
            dishMapper.delete(id);
            dishFlavorMapper.deleteBydishId(id);
        }

    }



    @Override
    public DishVO getByWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish=dishMapper.getById(id);
        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
        //将查询到的数据封装到VO
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
            //修改菜品表基本信息
            Dish dish=new Dish();
            BeanUtils.copyProperties(dishDTO,dish);
            dishMapper.update(dish);
            //删除原有的口味数据
        dishFlavorMapper.deleteBydishId(dishDTO.getId());
            //重新插入口味数据
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {dishFlavor.setDishId(dishDTO.getId());});
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public List<Dish> getByCategoryId(Long id) {

        Dish dish = Dish.builder()
                .categoryId(id)
                .status(StatusConstant.ENABLE)
                .build();
        List<Dish>dishes= dishMapper.getByCategoryId(dish);
       return dishes;
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.getByCategoryId(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish=Dish.builder().status(status).id(id).build();
        dishMapper.update(dish);
    }


}
